PDF malware analysis — malicious · f1d4fa45109e7e04

MALICIOUS

PDF

85.9 KB Created: 2021-03-19 22:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: f34551828a98a8b48e794114c54d42c0 SHA-1: f54d0f8930f0cb0a355947e1b6906b0f092f6d83 SHA-256: f1d4fa45109e7e04454445ab90d5a24611d174dff8c122c170d891d53822dc6d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted, 'https://nipisod.ru/wix?keyword=terrible+things+brick+%252B+mortar', appears to be a lure. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for malicious redirection or content delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://nipisod.ru/wix?keyword=terrible+things+brick+%252B+mortar PDF link annotation
- https://cdn-cms.f-static.net/uploads/4492286/normal_600bf9da6a63a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424637/normal_6020779c8adba.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486363/normal_5feb7a703a46b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490725/normal_5fe6dcdd04603.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495251/normal_60493a8d93b2e.pdfIn PDF document text
- http://kazexajisodibu.medianewsonline.com/arduino_pro_micro_pinout.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416935/normal_5fcf8316680a8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://jokosen.atwebpages.com/moropuvulemavogosir.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/195b6539-722f-41ca-b6e5-6b1721c415ba/how_long_should_ring_doorbell_battery_last.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a820852c-b09b-4767-810d-bbfedad9bf47/sony_blu_ray_player_bdp_s590_remote.pdfIn PDF document text
- https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_56a9857fb7f4490fb01f1d2c209f8347.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/1a88518f-f0b4-43cc-a5ce-7176a1f7bf24/discussion_questions_shooting_an_elephant.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/de1f0f39-5e66-49d6-b9b8-6b73486eff42/know_why_you_believe_by_paul_e._little.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c401a84c-0c68-4374-af1a-303c641ab5fd/kenmore_800_dryer_start_switch.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cc45b838-d897-4a40-a0c9-d7b208bbbab7/21758640592.pdfIn PDF document text
- https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_a87fbe9551964fa0b13b1ae21a53463d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/70bca342-c903-40a5-80ab-9bd03c9efc04/mogonusogititusesilideru.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/56a684f3-a43b-451f-8951-2d6ea817d625/quran_english_and_arabic_app.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2db1c745-3272-4f96-a5b5-7ae15638c8f0/free_printable_grade_2_language_arts_worksheets.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/654e7ef3-9e6c-46f6-b912-1e9e2f6a928e/kexajo.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000102e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102E0	5156 bytes
SHA-256: `52cdf93c6aaefb3e44d03a784e50051b9dd249267a93ac0c88faf7cbd8101cae`
`font_01_sfnt_off0001142b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1142B	12356 bytes
SHA-256: `40a7b299502c4223777b2181b4bf3febe9a8ad03e42dc332682db5218eca92d6`
`font_02_sfnt_off00013c6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C6F	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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